Barbaresi et al again clearly document the increased incidence of autism, with its first appearance in the 1980-1983 group (Table 2).1 The increase is shown with 1 slope from 1980 through 1991 and a distinctly increased rate of autism from 1991 through 1997. They repeated the belief that “the timing of the introduction of the MMR [measles-mumps-rubella] vaccine [in 1971] did not coincide with the increased incidence of autism,”1(p42) referencing 5 studies that failed to demonstrate a relationship. However, attention has been focused more on the measles connection and the flawed assumption that the MMR vaccine has remained unchanged since its introduction in 1971.
Fischer F. Incidence of Autism. Arch Pediatr Adolesc Med. 2005;159(7):690–692. doi:10.1001/archpedi.159.7.691-a